Circuit board



FIG. 1 is a front left, perspective view of a first embodiment of a circuit board showing my new design;

FIG. 2 is a top view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a back view thereof;

FIG. 6 is a right view thereof;

FIG. 7 is a left view thereof;

FIG. 8 is a bottom view of a second embodiment of a circuit board showing my new design, all other sides being identical to the first embodiment;

FIG. 9 is a bottom view of a third embodiment of a circuit board showing my new design, all other sides being identical to the first embodiment;

FIG. 10 is a bottom view of a fourth embodiment of a circuit board showing my new design, all other sides being identical to the first embodiment;

FIG. 11 is a bottom view of a fifth embodiment of a circuit board showing my new design, all other sides being identical to the first embodiment;

FIG. 12 is a bottom view of a sixth embodiment of a circuit board showing my new design, all other sides being identical to the first embodiment; and,

FIG. 13 is a bottom view of a seventh embodiment of a circuit board showing my new design, all other sides being identical to the first embodiment.

The top rectangular surface area within each protruding block on the sides of the circuit board in FIGS. 1 and 2 form no part of the claimed design. All other broken lines in FIG. 1-3 form no part of the claimed design. 

CLAIM The ornamental design for a circuit board, as shown and described. 